could the stock radio be draining my battery?

could the stock radio be draining my battery?

Postby txbanana [OP] » April 25th 2020, 12:25am

So I just got my van back from a water pump repair and the radio light won't turn off now is that usual or should I be concerned?
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Re: could the stock radio be draining my battery?

Postby gman » April 25th 2020, 7:40pm

You could always check the fuse for draw.
To test for parasitic drain, unplug the negative battery cable and set up a multimeter on the 10A scale (though it might be a smaller scale for the radio).
Make sure that your test lead is also plugged into the correct socket.

Put one lead on the battery cable, and the other end on the battery post. Doesn't really matter which way you do it, but if you get negative readings it means you have it backwards, but ti's the same scale just without the -.
Wait a few seconds to a minute (you wake up the PCM when you do this), and see if the current draw drops to 0.
Oh, make sure that you clamp your door switch.
If it doesn't, pull the fuse in the fusebox int he footwell. If it goes away after that, then you have a draw.

You might also be able to achieve this exact same thing by skipping the battery test altogether, and just going straight to the radio fuse.
Set up the DMM on the fuse, and check for current when everything is supposed to be "asleep".
There shouldn't be any current running through that fuse.

EDIT: I saw that you got this done.
You could also go back to the place and ask them to check on it for you since it happened after they did it.
Unlikely, but they could have ripped a wire on the harness, and that wire could have been your "remote" wire, or a signal wire that tells your radio when you do/do not have the ignition on.
Radio could default to on when it's not connected.
Other possibilities include them just testing the car out and pressing things. One of those things could just be something on the radio that says "hey, I always want to dispaly time!".

I'm not really an electrical guy, so I'd also wait for other answers, but this is a basic test you can do.
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Re: could the stock radio be draining my battery?

Postby AstroWill » April 25th 2020, 9:34pm

txbanana wrote:So I just got my van back from a water pump repair and the radio light won't turn off now is that usual or should I be concerned?


Mine only turns on with the key or when you push the button on the front(pwr or clock or something like that), but I don't have that particular radio so I'm not 100% positive, but it should turn off. Maybe the owners manual has something to say about it.

The only way that I could see them being related is that something happened while connecting/disconnecting the battery.

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Re: could the stock radio be draining my battery?

Postby gman » April 25th 2020, 10:22pm

AstroWill wrote:
txbanana wrote:So I just got my van back from a water pump repair and the radio light won't turn off now is that usual or should I be concerned?


Mine only turns on with the key or when you push the button on the front(pwr or clock or something like that), but I don't have that particular radio so I'm not 100% positive, but it should turn off. Maybe the owners manual has something to say about it.

The only way that I could see them being related is that something happened while connecting/disconnecting the battery.


Can you explain what would/could happen during a battery disconnect?
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Re: could the stock radio be draining my battery?

Postby sixsix » April 25th 2020, 11:39pm

gman wrote: ... Can you explain what would/could happen during a battery disconnect?

Well, if you're not being foolish... I disconnect my Battery w/ a Brass Gizmo so I don't run it down while I take years to repair a couple of doors...

:whistle:

And as far as the OP says...
txbanana wrote:water pump repair

Maybe check w/ the "water pump" guy or gal that did yours.
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